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igmp configured - but multicast flooding

igmp configured - but multicast flooding

igmp configured - but multicast flooding

I've had a working IGMP config in place for some time but multicast now seems to be flooding out every switchport (switches are all L3 cisco 4948E).
on each switch the config was:

CODE -->

ip igmp snooping querier address 

and on the querier switch:

CODE -->

ip igmp snooping querier
ip igmp snooping querier address 

With this config, I found that running the command "sh ip igmp snooping groups" showed nothing, so I tweaked the config on each switch for vlan 1


ip pim sparse-mode
ip igmp version 3 

I can now see switchports joining and leaving the groups when I start/stop streams on my machine, but multicast continues to flood out every port as though snooping is not working at all. If I switch off promiscuous mode in wireshark, I don't see multicast traffic captured.

Any recommendations?

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